<template>
  <div class="upload-image">
    <el-upload
      multiple
      action="http"
      list-type="picture-card"
      :before-upload="handleBeforeUpload"
      :limit="1"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      ref="imageUpload"
      :on-remove="handleDelete"
      :show-file-list="true"
      :file-list="fileList"
      :on-preview="handlePictureCardPreview"
      :class="{ hide: fileList.length >= limit }"
      :http-request="fileUpload"
    >
      <i class="el-icon-plus avatar-uploader-icon"></i>
    </el-upload>
    <el-dialog
      :visible.sync="dialogVisible"
      title="预览"
      width="800"
      append-to-body
    >
      <img
        :src="dialogImageUrl"
        style="display: block; max-width: 100%; margin: 0 auto"
      />
    </el-dialog>
  </div>
</template>

<script>
import { crmFileSaveAPI } from "@/api/common";
export default {
  props: {
    value: [String, Object, Array],
    // 图片数量限制
    limit: {
      type: Number,
      default: 1,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["png", "jpg", "jpeg"],
    },
    load: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      loading: false,
      number: 0,
      uploadList: [],
      dialogImageUrl: "",
      dialogVisible: false,
      fileList: [],
    };
  },
  watch: {
    load(val) {
      if (val) {
        this.loading = true;
      } else {
        this.loading = false;
      }
    },
    value: {
      handler(val) {
        if (val) {
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(",");
          // 然后将数组转为对象数组
          this.fileList = list.map((item) => {
            if (typeof item === "string") {
              if (item.indexOf(this.$baseImgUrl) === -1) {
                item = { url: this.$baseImgUrl + item };
              } else {
                item = { url: item };
              }
            }
            return item;
          });
        } else {
          this.fileList = [];
          return [];
        }
      },
      deep: true,
      immediate: true,
      hfile: "",
    },
  },
  methods: {
    changeLoadings(type) {
      if (!type) {
        setTimeout(() => {
          this.loading = type;
          this.$emit("changeLoadings", type);
        }, 800);
      } else {
        this.loading = type;
        this.$emit("changeLoadings", type);
      }
    },
    fileUpload(content) {
      crmFileSaveAPI({ file: this.hfile })
        .then((res) => {
          if (res.code == 0) {
            this.changeLoadings(false);
            this.uploadList.push({ url: this.$baseImgUrl + res.data.path });
            this.uploadedSuccessfully();
            this.$emit("imgChange",res.data);
          } else {
            this.changeLoadings(false);
            this.number--;
            this.$message.error(res.msg);
            this.$refs.imageUpload.handleRemove(this.hfile);
            this.uploadedSuccessfully();
          }
        })
        .catch(() => {
          this.changeLoadings(false);
        });
    },
    handleBeforeUpload(file) {
      this.changeLoadings(true);
      // debugger;
      let isImg = false;
      if (this.fileType.length) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        isImg = this.fileType.some((type) => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
      } else {
        isImg = file.type.indexOf("image") > -1;
      }

      if (!isImg) {
        this.changeLoadings(false);
        this.$message.error(
          `文件格式不正确, 请上传${this.fileType.join("/")}图片格式文件!`,
          2500
        );
        return false;
      }
      if (this.fileSize) {
        this.changeLoadings(false);
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message.error(
            `上传图片大小不能超过 ${this.fileSize} MB!`,
            2500
          );
          return false;
        }
      }
      //   this.$modal.loading("正在上传图片，请稍候...");
      this.hfile = file;
      this.number++;
    },
    // 文件个数超出
    handleExceed() {
      this.$message.error(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 删除图片
    handleDelete(file) {
      const findex = this.fileList.map((f) => f.name).indexOf(file.name);
      if (findex > -1) {
        this.fileList.splice(findex, 1);
        this.$emit("input", this.listToString(this.fileList));
        this.$emit("imgChange");
      }
    },
    // 上传失败
    handleUploadError() {
      this.$message.error("上传图片失败，请重试");
      //   this.$modal.closeLoading();
    },
    // 上传结束处理
    uploadedSuccessfully() {
      if (this.number > 0 && this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        this.$emit("input", this.listToString(this.fileList));
        // this.$modal.closeLoading();
      }
    },
    // 预览
    handlePictureCardPreview(file) {
      this.dialogImageUrl = file.url;
      this.dialogVisible = true;
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        if (list[i].url) {
          strs += list[i].url.replace(this.$baseImgUrl, "") + separator;
        }
      }
      return strs != "" ? strs.substr(0, strs.length - 1) : "";
    },
  },
};
</script>
<style scoped lang="scss">
::v-deep .hide .el-upload--picture-card {
  display: none;
}
// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
  transition: all 0s;
}

::v-deep .el-list-enter,
.el-list-leave-active {
  opacity: 0;
  transform: translateY(0);
}
::v-deep .el-upload--picture-card {
  width: 80px;
  height: 80px;
  line-height: 80px;
}
::v-deep .el-upload-list--picture-card .el-upload-list__item {
  // width: auto;
  width: 80px;
  height: 80px;
}
.img_url {
  width: 80px;
  height: 80px;
}
</style>

